The only acceptable way to jump in weightlifting
is backwards. If the weight of the bar pulls us
forward we tend to miss the lift. Reaching full
extension as shown in the picture above allows
us to receive the bar directly over our center of
mass.

Mike Burgener has a beauty of a workout/drill
to teach reaching extension. The jumping
back squat.

Try 1 minute jumping back squat.
Use a 45 pound bar. Only leave the ground enough
to slip a piece of paper under your shoes.
Can you make it to 50?